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# -*- coding: utf-8 -*- |
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from itertools import chain |
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from benedict.utils import type_util |
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def _get_index(key): |
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if type_util.is_integer(key): |
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return key |
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return None |
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def generator_datastructures(item, index): |
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for _item in item: |
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data_chunk = _item.get(index) |
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if data_chunk: |
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yield data_chunk |
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def low_level_generator(item, index): |
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for _item in item: |
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if not type_util.is_dict_or_list_or_tuple(_item): |
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yield _item |
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elif type_util.is_list(_item): |
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for __item in _item: |
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if index in __item: |
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yield __item.get(index) |
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elif __item: |
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yield __item |
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elif type_util.is_dict(_item) and index in _item: |
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yield _item[index] |
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elif index in _item and not type_util.is_wildcard(index): |
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yield _item[index] |
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def generator_to_list(generator): |
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new_list = [] |
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for item in generator: |
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if type_util.is_list_or_tuple(item): |
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new_list.extend(item) |
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else: |
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new_list.append(item) |
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return new_list |
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def _get_item_key_and_value_for_parent_wildcard(item, index): |
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if type_util.is_list_of_dicts(item) and any( |
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index in _item.keys() for _item in item |
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): |
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return index, low_level_generator(item, index) |
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elif type_util.is_list_of_list(item): |
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if type_util.is_integer(index): |
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data = [_item[index] for _item in item if index < len(_item)] |
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return index, data |
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elif type_util.is_wildcard(index): |
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data = list(chain.from_iterable(item)) |
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return index, data |
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else: |
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data = [ |
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_item.get(index) |
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for _item in chain.from_iterable(item) |
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if index in _item.keys() |
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] |
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return index, data |
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elif type_util.is_wildcard(index): |
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return index, item |
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return index, None |
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def _get_item_key_and_value(item, index, parent=None): |
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if type_util.is_generator(item): |
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return index, low_level_generator(item, index) |
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elif type_util.is_list_or_tuple(item): |
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if type_util.is_wildcard(parent): |
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index, item = _get_item_key_and_value_for_parent_wildcard(item, index) |
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if item: |
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return index, item |
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elif type_util.is_wildcard(index): |
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return index, item |
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else: |
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index = _get_index(index) |
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if index is not None: |
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return index, item[index] |
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elif type_util.is_dict(item): |
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return index, item[index] |
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raise KeyError(f"Invalid key: '{index}'") |
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def _get_or_new_item_value(item, key, subkey): |
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try: |
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_, value = _get_item_key_and_value(item, key) |
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if not type_util.is_dict_or_list_or_tuple(value): |
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raise TypeError |
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except (IndexError, KeyError, TypeError): |
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value = _new_item_value(subkey) |
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_set_item_value(item, key, value) |
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return value |
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def _new_item_value(key): |
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index = _get_index(key) |
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return {} if index is None else [] |
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def _set_item_value(item, key, value): |
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index = _get_index(key) |
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if index is not None: |
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try: |
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# overwrite existing index |
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item[index] = value |
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except IndexError: |
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# insert index |
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item += [None] * (index - len(item)) |
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item.insert(index, value) |
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elif type_util.is_list(item): |
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for idx, _item in enumerate(value): |
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if _item is not None: |
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item[idx].update({key: _item}) |
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else: |
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item[key] = value |
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def get_item(d, keys): |
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items = get_items(d, keys) |
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return items[-1] if items else (None, None, None) |
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def get_items(d, keys): |
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items = [] |
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item = d |
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for index, key in enumerate(keys): |
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try: |
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if any(items): |
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parent = items[-1][1] |
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else: |
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parent = None |
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item_key, item_value = _get_item_key_and_value(item, key, parent) |
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items.append((item, item_key, item_value)) |
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item = item_value |
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except (IndexError, KeyError): |
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items.append((None, None, None)) |
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break |
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return items |
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def set_item(d, keys, value): |
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item = d |
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i = 0 |
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j = len(keys) |
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while i < j: |
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key = keys[i] |
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if i < (j - 1): |
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item = _get_or_new_item_value(item, key, keys[i + 1]) |
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i += 1 |
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continue |
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_set_item_value(item, key, value) |
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break |
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fabiocaccamo /
python-benedict
